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Interline CCD implementation of hybrid two color per pixel architecture

a technology of image sensor and interline ccd, which is applied in the direction of tv system scanning details, radioation control devices, television systems, etc., can solve the problem of undesirable inherent color cross-talk, and achieve the effect of preventing cross-talk

Active Publication Date: 2008-09-09
SEMICON COMPONENTS IND LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This solution effectively minimizes color cross-talk, enhancing the accuracy and precision of color representation by ensuring that charges are stored and transferred at distinct depths, thereby improving image quality.

Problems solved by technology

Although the above method is satisfactory, they include drawbacks.
Color cross-talk is an undesirable inherent feature of the above methods.

Method used

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  • Interline CCD implementation of hybrid two color per pixel architecture
  • Interline CCD implementation of hybrid two color per pixel architecture
  • Interline CCD implementation of hybrid two color per pixel architecture

Examples

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Embodiment Construction

[0014]Referring to FIG. 1, there is shown a top and side view of an image sensor of the present invention. The image sensor includes a color filter array 10 positioned covering a silicon substrate 20. The color filter 10 separates the incoming light into substantially distinct portions according to its wavelength so that different colors are absorbed at different wavelengths. In the preferred embodiment, a color filter 10 having an alternating pattern of magenta 30 and green 40 is used so that each pixel respectively receives the light permitted by its respective color filter, magenta and green filter in this embodiment. In this regard, the magenta 30 transmits the blue and red incoming light, and the silicon substrate releases electrons at different depths in the substrate and stores them at different charge locations respectively 50 and 60. The green filter 40 transmits the green light and the silicon substrate 20 releases electrons at a depth different or the same as the blue and...

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Abstract

An image sensor includes at least first and second photo-sensitive regions; a color filter array having at least two different colors that selectively absorb specific bands of wavelengths, and the two colors respectively span portions of predetermined photo-sensitive regions; and wherein the two photo sensitive regions are doped so that electrons that are released at two different depths in the substrate are collected in two separate regions of the photo sensitive regions so that, when wavelengths of light pass through the color filter array, light is absorbed by the photo sensitive regions which photo sensitive regions consequently releases electrons at two different depths of the photo sensitive regions and are stored in first and second separate regions; at least two charge-coupled devices adjacent the first photo sensitive regions; and a first transfer gate associated with the first photo sensitive region that selectively passes charge at first and second levels which, when at the first level, causes the charge stored in the first region to be passed to one of its associated charge-coupled devices, and when the transfer gate is at the second level, charge stored in the second region is passed to one of the associated charge-coupled devices.

Description

FIELD OF THE INVENTION[0001]The invention relates generally to the field of transfer gates for image sensors and, more particularly, to a transfer gate having a plurality of transfer voltage levels so that adjacent photosensitive areas can be selectively transferred to associated charge-coupled devices.BACKGROUND OF THE INVENTION[0002]Current image sensors use a variety of methods for creating color separation. One such method uses the differences in absorption length in silicon of light of different wavelengths for color separation, such as in U.S. Pat. Nos. 5,965,875 and 4,613,895. In this regard, the incoming light is stored in separate regions of the substrate according to its wavelength, and the pixels are arranged so that each pixel receives each color at distinct depths of the silicon.[0003]Another method of producing color separation in image sensors uses color filter arrays. In this regard, color filters are placed over the image sensor, and the color filter separates the i...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04N3/14H04N5/335H04N9/04H04N9/083H01L27/148H04N9/03H04N23/12H04N25/73
CPCH04N9/045H01L27/14837H01L27/14625H04N25/70H04N25/13
Inventor SUMMA, JOSEPH R.ERHARDT, HERBERT J.
Owner SEMICON COMPONENTS IND LLC